Spawn BIRTH event and AIs additions and UNDO.

[ADHS]

AIs to have the "start from ground" option as Clients.
WHY: Because they have to occupy a "valuable" parking
slot of a Client, so to be placed in the same airport.

I've found that S_EVENT_BIRTH is giving event.place
information ONLY if a unit spawns from a PARKING SLOT.
(Reported to Grimes to double check this finding.)
So it will be better if S_EVENT_BIRTH gives event.place
info of spawn for all objects inside an airport zone.
WHY: Because "start from ground" doesn't fills up
the event.place field even if the spawn happened
inside the area of an airport.

An UNDO option in Mission Editor.

Edited October 22, 2022 by ADHS

[Chump]

3 hours ago, ADHS said:

An UNDO option in Mission Editor.

+1